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Diagnostic software descriptions and troubleshooting
5.9
Troubleshooting
5.9.1
Troubleshooting A/V board
Testing of A/V board can be done using diagnostic software
"PLAYER SCRIPT".
MONO board is used to generate a sound with the sound
tests SND-1 and SND-2 or a VIDEO signal with the picture
"DIAGNOSTIC SOFTWARE: SCRIPT INTERFACES".
AUDIO PART OF AUDIO/VIDEO BOARD 3139 243 30241
START
DIAGNOSTIC SOFTWARE
YES
YES
YES
YES
AUDIO CINCH & SCART
END
www.rtv-horvat-dj.hr
NO SOUND OUTPUT
ON AUDIO CINCH
1005B/C AND SINGLE
SCART 1002
ACTIVATE
" PLAYER SCRIPT "
NO
CHECK
POWER SUPPLY
3V3_A and 3V3_B
TO DAC ?
NO
CHECK
AUDIO I2S
SIGNAL TO DAC
?
NO
CHECK
DAC OUTPUT
AT TP12
?
NO
CHECK
AUDIO CINCH
AND SCART
OUTPUT ?
?
SOUND ON
OK
DVD612 /XX1
PM3380B
ch1
1
CH11.00V~MTB500usch1+
TP13: ANALOG OUTPUT AUDIO L/R
To activate the "Player Script ",press Open/Close and
Stop keys on the local keyboard of the DVD player
simultaneously.
Proceed to the nuclei "AudioPinkNoise" by pressing
NEXT key until display shows "APP SND-1" and
seconds later it show " Scart DVD "
Check supply voltages at connector 1010
Pin 9
-> -5Vstdby
Pin 10/11-> +5V
Check 3V3 regulator 7203 and safety resistor 3209 ,
3237
Check the delay cct 7512 , 3238 , 3239 , 2237
Check the Flex cable to connector 1010
Check Mono Board
Check I2S signal at testpoints 7 , 8 , 9 , 10
Check the Flex cable to connector 1010
Check Mono Board
Check Vref-DAC on Pin 12 of DAC IC 7200 1V6
Check for malfunction of DAC IC 7200
Check audio signal at TP 13
Check KILL signal at Pin 12 connector 1010
Audio mute OFF -8V ± 10%
Check for malfunction of KILL transistor 7501 , 7502 ,
7506 ,7507
Check ± 5V supply to OP-AMP 7201
Check gain configuration of OP-AMP 7201
Check for malfunction of OP-AMP 7201
Check Mono Board
5.
GB 33
CL 16532007_020.eps
130201
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